syzbot


BUG: unable to handle kernel paging request in __free_object

Status: auto-closed as invalid on 2019/11/27 10:43
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+987033db39aea1cf54d7@syzkaller.appspotmail.com
First crash: 1701d, last: 1701d

Sample crash report:
BUG: unable to handle page fault for address: ffff888060bbf4d8
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD b601067 P4D b601067 PUD 943b0063 PMD 65888063 PTE ffff888065888e30
Thread overran stack, or stack corrupted
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 22654 Comm: syz-executor.3 Not tainted 5.3.0-rc6+ #179
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:hlist_add_head include/linux/list.h:787 [inline]
RIP: 0010:__free_object+0x899/0x1030 lib/debugobjects.c:354
Code: 89 18 74 2a 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 cc 06 00 00 48 8b 85 f0 fe ff ff <48> 89 43 08 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80
RSP: 0018:ffff8880ae809bb8 EFLAGS: 00010046
RAX: ffff88808894f0a8 RBX: ffff888060bbf4d0 RCX: 1ffff11015d063db
RDX: 1ffff1100c177e9b RSI: ffffffff833e208c RDI: ffff888060bbf4d8
RBP: ffff8880ae809d08 R08: 1ffffffff1139028 R09: ffff8880882cdac0
R10: ffffed1015d0138f R11: 0000000000000003 R12: dffffc0000000000
R13: ffffffff8a9a06c8 R14: ffff8880ae831ed0 R15: ffff88808894f0a8
FS:  0000555555839940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888060bbf4d8 CR3: 000000008f1ce000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __debug_check_no_obj_freed lib/debugobjects.c:969 [inline]
 debug_check_no_obj_freed+0x1e8/0x43f lib/debugobjects.c:994
 kmem_cache_free+0x18f/0x320 mm/slab.c:3692
 file_free_rcu+0x98/0xe0 fs/file_table.c:50
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch kernel/rcu/tree.c:2114 [inline]
 rcu_core+0x67f/0x1580 kernel/rcu/tree.c:2314
 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2323
 __do_softirq+0x262/0x98c kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x19b/0x1e0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:537 [inline]
 smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1133
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
Modules linked in:
CR2: ffff888060bbf4d8
---[ end trace 4eed2d4ac1c9c2b6 ]---
RIP: 0010:hlist_add_head include/linux/list.h:787 [inline]
RIP: 0010:__free_object+0x899/0x1030 lib/debugobjects.c:354
Code: 89 18 74 2a 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 cc 06 00 00 48 8b 85 f0 fe ff ff <48> 89 43 08 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80
RSP: 0018:ffff8880ae809bb8 EFLAGS: 00010046
RAX: ffff88808894f0a8 RBX: ffff888060bbf4d0 RCX: 1ffff11015d063db
RDX: 1ffff1100c177e9b RSI: ffffffff833e208c RDI: ffff888060bbf4d8
RBP: ffff8880ae809d08 R08: 1ffffffff1139028 R09: ffff8880882cdac0
R10: ffffed1015d0138f R11: 0000000000000003 R12: dffffc0000000000
R13: ffffffff8a9a06c8 R14: ffff8880ae831ed0 R15: ffff88808894f0a8
FS:  0000555555839940(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff888060bbf4d8 CR3: 000000008f1ce000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/08/29 10:42 net-old 9e8312f5e160 fd37b39e .config console log report ci-upstream-net-this-kasan-gce
* Struck through repros no longer work on HEAD.